Antoni:
>In order to have good on-screen legibility... a dark background screen is
>recommended with light
coloured text. ...Do you know of any references on the subject or do you
know the possible reasons for it?
Basic Perception:
Light/bright dominates. It is easier to find a star in the dark night sky
than to find a dark dot on a sheet of white paper.
Light/bright "blooms". esp. In a back-lit lightsource-driven environment,
like a TV or computer monitor, light images visually "grow" and "bleed" onto
darker backrounds.